EP 1801629 A1 20070627 - Wide-angle optical system for solid image pickup device
Title (en)
Wide-angle optical system for solid image pickup device
Title (de)
Optisches Weitwinkelsystem für eine Aufnahmevorrichtung
Title (fr)
Système optique grand-angle pour dispositif de capture d'images
Publication
Application
Priority
JP 2005372266 A 20051226
Abstract (en)
It is to provide a wide-angle optical system for a solid image pickup device that favorably corrects distortion. The imaging lens is a biconvex lens, the object side face is formed into an aspheric shape in which the negative refracting power becomes stronger the farther the imaging lens is from an optical axis in the radial direction, and a condition expressed by the following expression (1) is to be satisfied; 0.8>r1/r2≥0.5 where,r<sub>1</sub> : center radius curvature of the object side face of the imaging lensr<sub>2</sub>: center radius curvature of the image surface side face of the imaging lens.
IPC 8 full level
G02B 13/00 (2006.01)
CPC (source: EP US)
G02B 9/02 (2013.01 - EP US); G02B 13/0025 (2013.01 - EP US); G02B 13/18 (2013.01 - EP US); G02B 13/22 (2013.01 - EP US)
Citation (search report)
- [X] EP 0819952 A2 19980121 - EASTMAN KODAK CO [US]
- [A] JP H06118300 A 19940428 - CANON KK
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
EP 1801629 A1 20070627; JP 2007171785 A 20070705; JP 4856947 B2 20120118; US 2007146899 A1 20070628; US 7495844 B2 20090224
DOCDB simple family (application)
EP 06126629 A 20061220; JP 2005372266 A 20051226; US 64141706 A 20061219